Roasting-furnace.



PATENTED JULY 14, 1903.

F. KLBPE'I'KO. ROASTING FURNAGB. APPLIOATIOK rmm MAY 25, 1903.

Y E0 MODEL INVENTOI? 67 i By Y 6&2 (I

Urvrrnn Sterne ATENT Patented July 14, 1903.

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ROASTlNG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 733,658, dated July 14 1903. Application filed May 25,1903, Serial No. 158,734. (No modelj of which the following is a full, clear, and exact description, reference being. had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in roasting-furnaces; and it consists in the novel construction and arrangement of parts more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a vertical central section of a conventional McDougall oreroasting furnace, showing my invention applied thereto. Fig. 2 is a vertical sectional detail showing the connection between the central water-feed pipe and the series of distributing-pipes rotatable aboutthe same, and Fig. 3 is a cross-section on line 3 3 of Fig. 2.

The present improvement-is a qualification of the Water-cooling feature shown and described in the furnace covered by United States Letters Patent No. 700,339, granted to William J. Evans and myself under date of May 20, 1902, and has for its object the simplification of the patented constructionin certain particulars,snch simplification resulting from the fact of making the water-feed pipe stationary instead of rotatable,as is the case of the patented construction, the qualification consisting in making the distributing-pipes rotatable about the feed-pipe by means of a loose coupling or band freely rotatable about the pipe, the inner ends of the distributingpipes being secured directly to such coupling. This arrangement dispenses with the necessit-y of a special joint between the stationary supply-pipe and rotatable feed-pipe and of the enlarged length of piping coupled to the feedpipe above the furnace, as shown in the patented construction, and likewise dispenses with the necessity of rotating the feed-pipe. This qualification of the original construction in no wise affects the course of circulation of the cooling medium, the circulation being in all respects as in the patented construction, as will more fully appear from a detailed description of the invention, which is as follows:

Referring to the drawings, Erepresents the furnace, and b the several hearths in which the material is treated, the material dropping from the upper hearth successively through the several hearths until it is delivered intothe delivery-hopper O, the hearths being provided, respectively,with the central and marginal openings 1 2 for the passage of the material. Passing through the hearths is the rotatable hollow shaft 3, from which radiate the series of hollow arms 4, extending into the several hearths and carrying rakes 5,

by which the material is successively fed from 'one hearth to the hearth immediately beneath it, all as fully described in the patent aforesaid and as fully understood in the art.

Located within the shaft 3 is a stationary water-feed pipe 6, the bottom thereof being closed and loosely-resting in a cup-shaped bearing 7 at thebase of the hollow shaft, the feed-pipe receiving its water from a rigidlysupported pipe 6, leading to any suitable source of water-supply. (Not shown.) Leading from the peripheral walls of the waterfeed pipe 6 and communicating with the interior of the hollow arms 4 and freely rotatable about the said feed-pipe 6 are a series of open-ended branches or distributing-pipes 8, which convey the water of circulation into the hollow arms, the said water finally passing up through the shaft, being returned to a point adjacent to the feed end of the feedpipe, as in the patented construction aforesaid. The water is finally discharged above the furnace through the taps 9 (at the upper end of the hollow shaft) into a trough 10, from which the water may be suitably conveyed as desired.

The manner of rotatably coupling the distributing-pipes to the stationary water-feed pipe is best shown in Figs. 2 and The in- .ner ends of the distributing-pipes are secured to a band or coupling-ring 11, freely rotatable about the feed-pipe and resting on a sup- IOO ways be in free communication with the interior of the feed-pipe, and the free circulation of the water through said feed-pipe and distributing-pipes will in no wise be effected or retarded. The path of the current of the cooling medium is fully indicated by the arrows in the drawings.

The mechanism by which rotation is imparted to the hollow shaft 3 while shown is not specifically adverted to in the present description, as it forms no part of the present invention and, moreover, is the same as that shown in the patent aforesaid. So, too, other parts of the furnace are here shown, but not described, as they are either covered by the patented construction or are well known in the art, it being understood that the present invention is limited to the details relating to the feature of Water circulation.

From the foregoing it will be seen that the present invention contemplates the disposition of a series of water-distributing pipes freely rotatable about a stationary waterfeed pipe, the connection between said pipe and distributing-pipes being in the present instance efiected by a loose ring orband freely rotatable about the feed-pipe and communieating with the interior thereof through a series of peripheral discharge-openings, Which are adapted to convey the water through the ring and into the distributing-pipes, from which the water is delivered into the hollow arms and shaft, finally escaping as already fully indicated.

I do not wish, of course, to limit myself to any particular detail of construction by which the loose connection between the distributing-pipes and feed-pipe is effected, as that may be varied without affecting the nature or spirit of my invention.

The term feed end of' the feed-pipe of course has reference to that portion of the feed-pipe immediately above the furnace at which the water of circulation may be supposed to enter the pipe from any suitable source of supply.

Having described my invention, what I claim is- 1. In a furnace having a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft, and extending into the several hearths, an inner stationary water-feed pipe located within the shaft, a series of branches or distributing-pipes located within and communicating with the interior of the hollow arms and freely rotating therewith about the feed-pipe, the latter discharging the water through its peripheral walls into the inner ends of the distributing-pipes, whereby the same is caused to circulate through the arms and hollow shaft to a point adjacent to the feed end of the feed-pipe, substantially as set forth.

2. In a furnace having a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, an inner stationary water-feed pipe located within the shaft, said pipe having peripheral discharge-openings, a series of branches or distributing-pipes located within and communicating with the interior of the hollow arms and rotating therewith and with the shaft, and intermediate loose connections between the inner ends of the distributing-pipes and the peripheral discharge-openings of the feed-pipe for conveying the water through the walls of the feedpipe into the distributing-pipes during the rotation of the latter, and causing the same to circulate through the arms and shaft to a point adjacent to the feed end of the feedpipe, substantially as set forth.

3. In a furnace having a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft, and extending into the several hearths, an inner stationary water-feed pipe located within the shaft, a series of branches or distributing-pipes located within and communicating with the interior of the hollow arms and rotating therewith and with the shaft, the feed-pipe having peripheral discharge-openings at points opposite the inner ends of the distributing-pipes, bands or coupling-rings loosely mounted on the feed-pipe about the peripheral dischargeopenings aforesaid, the inner ends of the distributing-pipes being connected to said rings and thereby establishingcommunication with the interior of the feed-pipe whereby the water is caused to circulate through the hollow arms and shaft to a point adjacent to the feed end of the feed-pipe, substantially as set forth.

4. In a furnace having a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, an inner stationary water-feed pipe closed at the bottom located within the shaft, a series of branches or distributing-pipes located within and communicating with the interior of the hollow arms and rotating therewith and with the shaft, and intermediate loose connections between the inner ends of the distributing-pipes and the peripheral walls of the feed-pipe for conveying the water through the walls of the feed-pipe into the distributing-pipes during the rotation of the latter, and causing the same to circulate through the arms and shaft to a point adjacent to the feed end of the feedpipe, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK KLEPETKO.

Witnesses:

A. G. GUNBERG, M. A. OESTANA.

ITO 

